1N4737UR

Overview

The 1N4737UR is a 7.5 V Zener diode manufactured by Microchip Technology, designed for voltage regulation and protection applications. It features a maximum power dissipation of 1 W and a nominal Zener voltage tolerance of ±10%. The device operates in the surface-mount DO-213AB (MELF) glass package. Maximum impedance is specified at 4 Ohms, with a reverse current of 10 µA measured at 5 V.

Feature Summary

• Provides stable voltage regulation using silicon Zener breakdown characteristics
• Utilizes hermetically sealed glass MELF construction for environmental durability
• Supports unidirectional voltage regulation in compact surface-mount form factor

Applications

• Voltage regulation circuits
• Overvoltage protection systems
• Reference voltage generation

Procurement Notes

Verify the specific ordering suffix to confirm compliance status and packaging type. Confirm that the component matches the required DO-213AB package dimensions and lead finish specifications. Ensure the manufacturer designation aligns with Microchip Technology requirements for your design. Check datasheet revisions for any updates to mechanical or electrical parameters before finalizing procurement.

Selection Notes

Select this component when a 7.5 V regulation point is required in a surface-mount application. The DO-213AB package offers a compact footprint suitable for space-constrained designs. Verify that the 1 W power rating and 4 Ohm impedance meet the circuit's thermal and noise requirements. Ensure the ±10% tolerance is acceptable for the intended voltage reference accuracy.

Part Context

This part belongs to the standard Zener diode family produced by Microchip Technology. It shares functional similarities with other 1N47xx series devices but differs in its specific surface-mount packaging. The 1N4737 variant specifically denotes the 7.5 V nominal voltage level within this regulatory diode lineup.

Replacement Considerations

Compatible substitutes include the 1N4737P and 1N4737UR-1 from Microchip Technology. These parts share identical electrical specifications but may differ in packaging or compliance markings. Verify pinout compatibility and thermal performance before substitution.